The October 2009 Social Radar Top 50 measures the brands with the most active Web presence based on overall online conversation volume. To create the Top 50 list, we used Social Radar to analyze millions of blog posts, news feeds, forums, social networks and Twitter posts to aggregate a list of the words and brands mentioned most frequently on the Web during October 2009. The list measures the number of unique individuals or sources that posted content about each brand during October 2009 rather than the overall number of mentions, which would be more heavily influenced by big fans who post frequently about a specific brand.

There are no big surprises with the Top 10 this month. NFL dropped 10 spots as the season opening excitement has died down a bit, while NBA jumped 11 spots as the basketball season kicks off. AT&T has dropped, while other cell phone related brands have increased such as LG and Blackberry, as well as newcomers to the list – HTC and Android. With many new Android devices out and on the horizon, as well as the recent “droid does” campaign, Android has joined our list this month at a surprising 29th place.

View the full list below, or download the PDF. For additional information about how you can analyze chatter sentiment to gauge positivity/negativity, view key words mentioned about your brand and identify key influencers, visit www.infegy.com/socialradar.

Questions or comments? Twitter me @adamcoomes.